At least 8 years, seems to me when they had lead in the fuel, it lasted for ever, no the unleaded gas they use now does not last as long. I have a chipper that I started Sunday, 1st time in 3 yrs. fired right up. I guess if your storing for over a year, use the stabilizer.

Before the hurricane got my old outboard motor I would put some sta-bil in the tank and run some through the carbs while flushing the water pump before storing it over the winter months.

Logged

May the hinges of our friendship never grow rusty.

About the icons: The beer is tip link, if a tech saves ya some money buy em a 6 pack. The small green square=personal message. The green dot is a link to my web page on appliance repair and other general BS I love to post. The letter sends me email.I love fan letters! LOL

Another tip from a friend who is a small engine mechanic is to only use premium, no-ethanol gas. But yeah, I've been using Sta-bil or Wynn's gas treatment for years. Never have any problems with mower/snow-blower/pressure washer etc.